Mold



G. L.. MATHER MOLD Filed Aug. 19 1921 3 sheets-sheer 1 Dec.. 2, 1924.;

G. L. MATHER MOLD fl v

Filed Aug. 19 1921 3 Sheets-Sheet GEORQE L. MTHEP /NVENTR Patented bec.2.1924., i j 1,517,850

UNITED STATES PATENT oFFicEq.

GEORGE L. MATHER, F MILWAUKEE, WISCONSIN, ASSIGNOR, BY MESNE ASSIGN-MENTS, T0 THE FISK RUBBER COMPANY, OF CHICOPEE FALLS, MASSACHUSETTS, ACORPORATION OF MASSACHUSETTS.

MOLD. Application filed August 19, 1921. Serial No. 493,522.

To all whom t may concern.' into the position shown in Figure 3 tothere- Be it known that I, GEORGE L. MATHER, a by full-mold the treadportion 19 between citizen of the United. States, and a resident theplates 20 andthe core 14. Y

of Milwaukee, in the county of Milwaukee The mold sections 16 and 17 areprovided and State of Wisconsin, have invented cerwith suitable recesses25 and 26 adapted to 55 tainnew and useful Improvements in Molds,lreceive the unit as shown in Figure 3 and of'which the following isaspecification. with mold faces 27., adapted to engage the My inventionrelates to molds and the side walls 28 of the casing 13 to thusfullprincipal 'object o f my invention is to promold' these side wallsbetween the faces 27 vide a new and improved mold. In the and the core14 as shown in Figure 4. The 6 0` drawings accompanying thisspecification section 16 is provided with a pin 29 ada ted and forming apart thereof I haveshoxvn, to enter an aperture 30 in the section 1 tofor purposes of illustration, one form which thus compel registration ofthe sections. myrinvention may assume. In these draw- The ring 23 may bepositioned 1n any suit- 5 ings: able manner as by ram pressure appliedon 65 Figure l is a sectional view of my mold one side to the ring 23and on the other side Showing the parts in exploded position, to theplates 20 or the ring 23 may be pro- Figure 2 shows the bead ringsapplied, portioned' as shown and engaged by the re- Figure 3 -shows thetread rings in posi- .cess 25 ofthe section 16 as thevplates 20 aretion, l engaged by the recess 25-of the section 17 70 Figure 4 shows theassembled mold, while whereby ram pressure applied to the sec- Figure 5shows the tread plates in more tions 16 and 17 will reciprocate the ring23 detail. I over the plates 20 and thereby position these The moldherein shown comprises a pair plates. V of bead rings 11 adapted toengage and po- It will be understood that various modi'- 75 sition thebeads 12 of a casing 13 vwhich is lications and changes may be made inthe mounted upon a rigid core 14 and may have herein described apparatusand that I have 'been constructed thereon by the aid of core notattempted to describe or indicate all pads 15. The beadV rings 11 may beinsuch alternatives. The disclosure herein is 80 tegral or unitary withthe mold sections 16 therefore illustrative only and my invention so and17 but are shown as separate and acis of course not limited thereto.cordingly as adapted to be separately moved I claim: into positionabutting the core 14 as shown 1. A mold comprising a pair of co-operatinre 2 in which position they may be ing .'nold sections, aplurality oftread plates, secured by any suitable means such as the projecting sidewall molding surfaces on 85 bolts 18. said mold sections, andreciprocatingmeans The tread portion 19 of the casing 13 is independentof said mold Isections adapted engaged by a plurality of tread plates 20to contract said plates, said last named preferably four in numberprovided on the means being positively engaged by said t 4o innersurface with a suitable tread design, mold sections.l 90 held inalignment in `any desired manner, 2. A mold comprising a pair 'ofeooperat' pierced by the vents 21, and having an outer ing moldsections, independent bead rings, a surface 22 formed as a segment of acone pluralityof tread plates each provided With Substantially co-axialwith the casing 13. a cam surface onv its exterior face, and

A ring 23 is provided having an inner face means independent of saidmold sections 95 24 adapted to cooperate with the outer faces adaptedvto be reciprocated along said cam 22 of the plates 20 in such mannerthat resurfaces to thereby contractsaid plates. ciprocatory motion ofthe ring 2,3 `substan- 3. A'mold comprising a pair of cooperattially inthe direction of the axis of the ing mold sections; independent beadrings, a

casing 13 will cam the plates 20 linwardly plurality of tread plateshaving conical ex- 100 terior faces, and a ring having an inner facecooper-able with said conical exterior faces and adapted to be forcedover said plates to thereby contract said plates.

- 4. A mold comprising a pair of co-operating mold sections, providedwith recesses, a plurality of tread plates, reciprocating meansindependent of said mold sections adapted to contract said plates, saidtread plates and contracting means bein receivable in said recesses,side Wall mol ing surfaces on said mold sections adjacent said recesses,and independent bead rings adapted to be guided into position by saidmold sections.

In testimony whereof I have signed my name to the above specification.

GEORGE L. MATHER.

